JPH02231348A - Gripping device for carrying adhesive material web - Google Patents

Abstract

PURPOSE: To smoothly carry a mat strip without any hindrance by forming a constitution in that the forceps leg parts of holding forceps are provided with a foil used for reducing an adhesive action and passing through therebetween; switching the holding forceps to an unloading state isolates the foil from the adhesive mat strip. CONSTITUTION: An upper and a lower forceps leg part 14a, 14b move a carriage 12 as well as holding forceps 14 with the end section 2a of a resin mat web gripping. After required cutting processing, the carriage 12 is moved as far as the given mat strip-unloading position with the forceps 14 closing. Next, a cylinder unit 22 is switched to a pressure-free state from a pressure load state to form a state in which dead weight rides the leg part 14a on the end section 2a. Running a cylinder unit 25 moves the forceps 14 as well as a reciprocating stand 20 toward the right side. Meanwhile, a foil 23 for adhesion reduction reversely moves in the direction of end section 14g or 14h of the associated leg part 14a or 14b and is then isolated from the stationary end section 2a.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a gripper device for entraining adhesive material webs, which comprises a carriage movably guided in the longitudinal direction of the material web and a remote The present invention relates to an actuated holding forceps, of the type in which the forceps legs of said holding forceps are configured such that the adhesive action is reduced on their mutually facing inner surfaces.

Material webs, especially SMC (sheet mou)
prior to converting the resin mat web into stamped parts, the resin mat web is processed by removing the cover foil from the resin mat web and (usually) by dividing it into rectangular mat strips and stacking them from these mat strips. Must form a pile. Mat strips of different widths are produced in this case as follows. That is, either a constant convergence material web is used and it is sectioned by cutting only in the transverse direction, or it is sectioned by cutting in the longitudinal and transverse directions to form matte strips whose width is smaller than the width of the material web.

From the point of view of economy and trouble-free operation, in the production of matte strips, the covering foil is first removed from the material web before it is separated by cutting it transversely or longitudinally and transversely. It is necessary to remove the

In this case, the step of conveying the adhesive material web from which the cover foil has been removed into the working area of the cutting device and the step of unloading the produced matte strip onto the conveying device involves the step of cutting the end section of the adhesive material web into the working area of the cutting device. At least one gripper device is required for grasping the material, bringing it together and separating it after cutting.

The object of the invention is to be able to apply tensile forces to adhesive material webs, which have a high service life, require low maintenance costs, and which do not disturb the matte strips obtained by cutting them. It is an object of the present invention to provide a gripper device that can be lowered onto a conveying device smoothly and with sufficient precision.

According to the invention, this problem is solved by claim l of the claims.
The problem is solved by a gripper device having the characteristics described.

According to the invention, the holding forceps, which is a component of the gripper device, is provided with an adhesion reduction foil on its forceps legs which passes through these areas, the foil being such that the holding forceps is switched into the unloaded state. When the mat strip located between the forceps legs is pulled in the direction of the end section of the forceps legs without movement, it separates from the adhesive mat strip. In short, during the separation process, the holding forceps mounted on the carriage are moved in the transport direction of the material web, while the mat strip is moved by the forceps legs opposite the adhesion reducing foil, which are in contact with it from both sides. movement towards the end section of the oil separates it from the adhesion-reducing oil.

The device according to the invention advantageously has a support frame attached to the carriage, relative to which the carriage is held movably in the longitudinal direction of the material web, and said support frame has an adhesive effect. It has a turning point that supports the reduction foil. The foil is fastened to both sides of a tensioning frame via end sections located one behind the other in the direction of conveyance of the material web, which tensioning frame is also arranged movably in the longitudinal direction of the material web relative to the supporting frame. ing.

Due to the action of the fixed turning points on the tensioning frame and the carriage, the adhesion-reducing oil is caused to move the forceps legs opposite each other when the carriage moves in a direction opposite to the conveying direction of the material web. Perform the movement along the inner side of the forceps towards the end section of the leg. The necessary initial tension of the adhesion reducing foil is generated by a spring element with a prestress, which spring element engages the tensioning frame with a prestress acting in the conveying direction of the material web. The holding forceps, which are caged and at the same time supported on the support frame, are pivotable so that the forceps legs assume a detached position approximately close to the leg closed position when the forceps drive is switched to an unloaded condition. It has forceps legs located on a carriage. The tensioning frame is arranged movably relative to the support frame, the support frame comprising support rolls between which the tensioning frame is arranged transversely and perpendicularly to the longitudinal direction of the material web. In short, this can be realized in a simple manner by exclusively holding the material web so that it can move back and forth only in the longitudinal direction (claim 2). The mobility of the carriage relative to the support frame and the tensioning frame is ensured by guide rolls which are movably supported on the tensioning frame in the longitudinal direction of the tensioning frame (claim 3). The holding forceps are advantageously constructed as follows. That is, the forceps leg located above the material web is pivotably connected to the carriage (claim 4).

According to one advantageous embodiment of the invention, the foil for reducing the adhesion effect is attached to the tensioning frame in such a way that it is wrapped around the free end section of the forceps leg, in other words the end section on the side of the material web. (Claim 5).

The fixing points for the seven foil end sections belonging to the upper forceps leg are located in front of the other foil end group one section, viewed in the conveying direction of the material web (claim 6).

In order to improve the holding effect of the holding forceps, the end section of the forceps leg has an inclined recess on its inside (claim 7). The recess is obtained in particular by providing an inclined inner wall section on the inside of the forceps leg in the area adjoining the end face section.

According to an advantageous embodiment of the invention, a spring element that engages and acts on the tensioning frame, a separation drive that engages and acts on the carriage, and a forceps drive that acts and engages on the forceps legs. is configured as a cylinder unit (claim 8). However, in contrast to this embodiment, it is also possible for the spring element to consist of a mechanical spring with an adjustable preload.

In order to be able to access the area of the holding forceps in the event of a breakdown, the support frame is connected to the carriage so that it can be pivoted outwards about a horizontal axis and, by means of a fixing device, It can be fixed at a variable working position via a stopper (claim 9). In this case, it is advantageous for the carriage to be provided with a brake device, by means of which the support frame can be stopped in a position pivoted outward from its working position (claim 10). According to this brake device,
Unintentional movement of the support frame outside its working position can be prevented.

The invention will now be explained with reference to the illustrated embodiment.

From coil 1 to S M as shown in figure wIl
C (sheet molding compound)
d) The resin mat web 2 is guided along the deflection roller 3 and unwound in the direction of the arrow 4, and is further guided along the redirection roller 3 and fed out in the direction of the arrow 4.
The adhesive resin mat web 2 is fed to a transverse cutting device 6 via a feed device 5 having a and 5b, which cuts the adhesive resin mat web 2 in the transverse direction and divides it into sections.

Between the feed device 5 and the transverse cutting device 6 is a height-adjustable clamp! ! A clamping device 7 with -7a, 7b and a cover foil tearing device with tearing rollers 8a, 8b are arranged. This cover foil tearing device serves to tear off the upper and lower cover foils 9a, 9b arranged on the resin mat web 2 to the upper and lower sides, in this case the clamps which are opened during the transport of the resin mat web 2. Joe serves as Doctor Blade. During the cutting process, which will be described later, the transport movement (movement to the right in FIG. 1) of the resin mat web 2 is interrupted. That is, in this case the clamping device 7 assumes the closed position and the clamping jaws 7
a, 7b are resin matte web 2 and cover foil 9a,
Fix 9b.

A longitudinal cutting device WllO is disposed at the rear of the transverse cutting device 6 having the transverse force cutter 6a when viewed in the transport direction of the resin mat web 2 (arrow 4 in FIG. 1). The device has one or more cutters 10a depending on the desired number of matte strips to be produced.

Each cutter is held rotatably about a stationary axis 10b arranged below the plane of the material web in a pivoting arm loc, which can be moved back and forth by a pivoting drive in the form of a cylinder unit lOd. be. Vertical cutting device I1
In this case, each cutter 10a is made of resin pine wood 2.
By pivoting from below into the range of , a cutting movement is carried out in the longitudinal direction of the resin mat web 2 in a direction opposite to the direction of its conveying movement. In this embodiment, the cutting movement is carried out by a counterclockwise movement of the pivoting arm lOc.In the area of the cutting devices 6 and 10, a gripper device 11 is provided, which is moved relative to the drawing plane via a carriage 12. Vertically, along two stationary guide rails l3 in the direction of the clamping device 7, holding forceps 14 arranged parallel to each other at a distance from each other hold the resin mat web 2.
It is movable up to the point where it is possible to grasp the end section 2a projecting to the right from the clamps 2-7a, 7b and carry it in the transport direction (arrow 4). This end section 2a
corresponds to the position of the transverse cutting device 6 and extends as far as the action range of the transverse force cutter 6a.

After the holding cloth 14 is closed and the clamping device 7 is opened, the resin mat web 2 is carried to the right by the running of the trolley 12 while simultaneously peeling off and climbing the cover foils 9a and 9b. Furthermore, the vertical cutting device lO is a cylinder unit l.
Activated by the actuation of Od (piston rod movement), each cutter lOa of its hook performs a cutting movement past the vicinity of the moving holding forceps 14, in which case the resin mat web carried by the holding forceps is vertically The mat is cut and divided into multiple mat strips in the direction. As soon as the resin mat web has been longitudinally sectioned according to the desired length of the mat strip, the movement of the resin mat web 2 is interrupted by stopping the carriage 12 and the feeding device 5;
By actuating the transverse cutting device 6, the plastic mat web 2 is then cut into sections transversely to its longitudinal direction, in which case the previously mentioned freely projecting end sections 2a are produced. As soon as the transverse cutting process is finished, the carriage 1 with the holding forceps 14
2 carries out a entraining movement into the working range of a transport device (not shown) onto which the produced mat strip is lowered, possibly forming a mat pile. The mat pile formed from the mat strings or mat strips by means of a conveying device is fed to a press tool for further processing.

The structure and mode of operation of the gripper device I1, whose associated carriage 12 is equipped with the holding forceps 14, will now be explained with reference to FIGS. 2 to 4.

A support frame 16 is attached to the trolley 12, which is shown without guide rails, via a pivot bearing l5 with a horizontal axis of rotation 15a, and which has four laterally projecting parts in its central section. Furthermore, one support roll 16b is provided at the end section on the opposite side to the swing bearing part 15 side, and the support roll 16b is provided in the direction of conveyance of the resin mat web (arrow 4 in FIG. 1). 16b
It has a direction change roll 16c behind it. Support roll 16
A tensioning frame 17 is movably held between the tensioning frames 17 and 17, the bent front or rear section 17a or 17b of which is each provided with a clamping unit l8 or l9. The tension frame 17 also has a carriage 2 with four guide rolls 20a.
The downwardly extending extension 20b of this carriage 20 supports the aforementioned holding forceps 14 via the lower forceps legs 14b. In short, the tension frame 17 and the carriage 20 having the holding forceps 14 are directly or indirectly held on the support frame 16 as follows. That is, these 1
7.20 supports the support roll 1 independently of the support frame 16
6a or tensioning frame 17 and guide roll 20a
It is held on a support frame 16 so as to be able to perform longitudinal movements in a predefined direction.

Above the pivot bearing l5, the support frame 16 has a stop surface 16d, via which the support frame 16 is fixed in the working position by a fixing device 21.

The fixing device 2l has a bracket 21a fixedly coupled to the carriage 12, within which a holding pin 2lb is guided so as to be movable in the vertical direction, and is lockable by a link lever 21c. holding bottle 2lb
The length of the support frame 16 is variable via the adjustment nut 21d, and by changing this length, the position of the support frame 16, for example relative to the vertical plane, can be changed at the same time.

The trolley 12 is further provided with an adjusting screw 12b on its underside on the side of the tension frame 20, which serves as a corresponding stop.
The support frame 16 is immovably supported on this screw by the action of the holding pin 2lb via the second stopper surface 16a on the upper side of the support roll 16a in both rotational directions.

The grip holder 14 is composed of an upper forceps leg 14a and the lower forceps leg 14b mentioned above, and the rear section of the lower forceps leg protrudes from the upper forceps leg. is fixedly connected to the extension 20b of the carriage 20. The upper forceps leg is pivotable about a pivot point 14c held in the lower forceps leg and continues in the region of the axis 14c into an adjustment arm 14d. The forceps drive (forceps actuator) which produces the movement of the upper forceps leg 14a consists of a cylinder unit 22, which is connected via a piston rod 22a and a cylinder casing 22b to the adjustment arm 14d or to the extension 20b of the carriage 20, respectively. It is pivoted. The holding forceps 14 are moved to the illustrated closed position by the movement of the piston rod 22a.

In order to improve the function of the holding net 14, its forceps legs are arranged on their mutually opposite inner sides 14e or 14.
f is provided with a continuous marking reduction foil 23, which has a plastic coating for reducing marking. The adhesion reducing foil 23 is attached to a fixing point 17c formed between the front section 17a of the tensioning frame and the clamping block 18a of the clamping unit 18.
Starting from , the deflection surface 17 of the front section 17a is
The end section 14g1 of the upper forceps leg d1 is further supported by the support roll 16b of the support frame 16, and is further supported via the deflection roll 16c to the lower forceps leg f! 14b and is further supported on its end section 14h, furthermore on the underside of the lower forceps leg 14b the rear section 17
It reaches the range of the second fixed side place 17f while contacting the direction changing surface 17e of b, and at this fixed place the clamp unit l
It is supported and fixed between the clamp block 19a of No. 9 and the corresponding surface of the rear section 17b. In the illustrated embodiment, the adhesion-reducing foil 23 essentially covers the upper forceps leg 1.
The fixing point 17c for the foil end section 23a of 4a is
It is arranged in such a way that it lies in front of the other foil end section 23b in the rear section 17b of the tensioning frame 17, as seen in the transport direction of the resin mat web. Direction change roll 16
c in this case forms a turning point, which is a component of which the deflection roll is connected to the support frame 16 and is immovable relative to the tensioning frame 17 as well as to the carriage 20. By moving the tensioning frame 17 relative to the support frame 16 in the conveying direction of the resin mat web (that is, in the direction to the right in FIG. 2), the adhesion reducing foil 2 is tensioned by the action of the deflection roll 16c.

This is brought about by a spring element in the form of a cylinder unit 24, which is pivoted between a bracket 16f in the central region of the support frame 16 and a projection 17g of the tension frame 17. The above-mentioned cylinder unit 24 is continuously loaded with a pressure medium when the gripper device is in operation and is guided movably in the longitudinal direction via a projection 17g in the form of a pressure spring. It acts on the frame 17. The preload of the spring element in this case is taken up by adhesion reducing foils 23 which are supported immovably on both sides.

A separation drive device R (separation actuator) in the form of a cylinder unit 25 is further attached to the bracket 16f, and its piston rond 25a is pivotally connected to a protrusion 20c on the upper side of the guide roll 20a of the carriage 20. There is. The cylinder units 24 and 25 are supported by the bracket 16f in parallel with a slight interval between them (@3 Figure). Cylinder unit 25 has a larger effective diameter than cylinder unit 24, which in this case has a larger stroke length. When the cylinder unit 25 runs out, in other words, when the carriage 20 moves to the right in the conveyance direction of the resin mat web, the holding forceps 14
The cylinder unit 22 is switched to pressureless and the deflection roll 16c is changed to the guide roll 16b. ! - if they are held stationary together, they will also move to the right, so that the adhesion reducing foil 23 carries out an equal and opposite movement along the inside between the two forceps legs 14a, 14b; Initially, the end section 2a of the resin mat web between the two forceps legs is separated. In other words, the foil section in contact with the resin mat web is the end section 1 of the forceps leg.
Pulled through 4g and 14h. As a result, the end sections of the adhesive resin mat web are released without any inherent movement.

The forceps leg has its end section 14g. to improve its entrainment action. A notch 14i or 14k is provided on the inner side of the forceps 14h, and these notches are mutually deepened by a predetermined length toward the forceps rotation axis 14c. Such an arrangement provides a degree of form-based bonding between the adhesion-reducing foil, the forceps legs and the section of the adhesive resin mat web gripped by the forceps legs.

The swivel bearing 15 (FIG. 3) has a brake in the form of a disk spring 15b with a preload, which presses the support arm 16 against the connecting surface 12a of the carriage 12, so that it can be rotated counterclockwise from the working position. The support frame pivoted outward in the direction can remain in its pivoted position without the action of any external forces. This pivoting process is then made possible in that the holding pin 2lb is returned in the direction of the bracket 21a by lifting the link lever 21c.

The working style of the gripper device 11 (FIG. 1) detailed above is as follows.

In order to grasp the end section 2a of the resin mat web protruding from the clamping device 7 to the right side in the figure, when the holding forceps I4 is opened, the carriage 12 moves the lower forceps leg 14b to the end section in a direction opposite to the conveying direction 4. It is caused to travel to the left in the drawing until it is located below at least a portion of the section 2a. Subsequently, the holding forceps 14 is closed by lowering the upper forceps leg 14a, and at this time the cylinder unit 12
remains under pressure. The carriage 12 is then moved to the right, so that the plastic mat web is carried along with the carriage 2 with the end section 2a immovably gripped.

After the necessary cutting process (cutting the resin mat web in the transverse direction or in the transverse and longitudinal directions), the carriage 12 is moved to a predetermined mat strip lowering position with the holding forceps 14 closed. The cylinder unit 22 is then switched from the pressure-loaded state to the pressure-free state in order to release the entrained matte strip. As a result, the upper forceps leg 14a is forced substantially only by its own weight into the end section 2.
It will be in a state where it is just riding on a. When the forceps drive device R (N-element actuator) is switched to no load,
The carriage 20 is moved to the right side together with the holding forceps 14 by the movement of the cylinder unit 25 (of the piston rod) (FIG. 4), and at this time the foil 23 for reducing the adhesion effect is moved to the right side together with the holding forceps 14.
As already mentioned, the attached forceps leg 14a or 1
moving in the opposite direction in the direction of the end section 14g14h of 4b;
It is separated from the stationary end section 2a.

The advantages provided by the present invention are as follows. This means that in the area of the holding forceps, the adhesion-reducing foil carries out its own separation movement, thereby successfully separating the adhesive resin mat web from the holding forceps, so that it can be lowered in the desired manner. It is, of course, also possible to use the adhesive-reducing foil in the region of the forceps legs in a different manner to that described above. What is important for the invention is that the adhesion-reducing oil undergoes a separating movement during the separation process, and this separation movement causes the adhesive resin mat web to automatically move without any lateral forces acting on its surface. This means that the forceps are sent out of the range of the forceps legs.

The gripper device can, if necessary, have several support frames, tension frames, carriages with holding forceps, etc., which are held on one common carriage and which move the longitudinal direction of the material web to be processed. can be arranged in parallel and laterally spaced apart from each other. For example, if one wants to divide one material web into two mat strips, a gripper device with two holding forceps can be used.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing the configuration of a mat strip production facility equipped with the gripper device of the present invention in the range of horizontal and vertical cutting devices, and FIG. 2 shows the guide rail shown in FIG. 1 omitted. A schematic side view of the gripper device, FIG. 3 is the same as ■- in FIG.
FIG. 4 is a cross-sectional view taken along line 1, and is a schematic diagram showing the layout of the gripper device, particularly the drive unit, with the carriage and guide rails omitted. DESCRIPTION OF SYMBOLS 1... Coil, 2... Resin mat web (material web), 2a... Resin mat web end section, 3...
Direction changing roller, 4... Conveying direction, 5... Feeding device, 5
a. 5b...Feed roller, 6...Transverse cutting device, 7.
...Clang attachment fl, 7a, 7b...Clamp jaw 8a. 8b...Peeling roller, 9a, 9b...
Cover foil, 10... Vertical cutting device, lOa...
Cutter, 10b...axis, lOc...swivel arm, 1
0d...Cylinder unit, 11...Gripper device, 12...Dolly, 14...Holding forceps, 14a...
Forceps leg, 14b... Forceps leg, 14c... Pivot point (axis), 14d... Adjustment arm, 14e... Inside,
14f...Inside, 14g...Leg end section, 14h
...Leg end section, 14i...Notch, 14k...
・Notch, l5... Swivel support part, l5a... Horizontal axis, l5b... Brake, 16... Support frame, 1
6a... Support roll, 16b... Support roll, 16
c... Return turning point, 16d... Stopper surface, 17
...Tension frame, 17c...Fixing point, 17f.
・Fixed point, 20 ・Reciprocating platform, 20a ・Guide a
- rule, 20b...extension part, 2l...fixing device, 21
a...Bracket, 2lb...Adjustment stopper, 2
1 c...Ripper Clever 21d...Adjustment nut,
22... Forceps drive device [, 22a... Piston rond, 22b... Cylinder casing, 23... Foil for reducing adhesion, 23a... Foil end section, 2
3b...Foil end section, 24...Spring element, 25...Separation drive device

Claims (1)

[Scope of Claims] 1. A gripper device for conveying an adhesive material web, comprising a carriage movably guided in the longitudinal direction of the material web, and a remotely controlled carriage arranged on the carriage. retaining forceps, the forceps legs of said retaining forceps being constructed such that the adhesive action is reduced on their mutually facing inner surfaces, wherein: (a) the retaining forceps (14) are coupled to a carriage (20), which carriage (20) is supported movably in the longitudinal direction of the material web (2) relative to a support frame (16) carried on the carriage (12); (b) The forceps legs (14a, 14b) are connected to the material web (2).
Beyond the forceps leg pivot point (14c) when viewed in the conveyance direction (4), on the inside of the forceps legs (14e, 14f), a continuous continuous foil for reducing adhesion (23) common to the forceps legs (14e, 14f) is provided. a tensioning frame (17), comprising a tensioning frame (17), in which the end sections (23a, 23b) of the foil are held movably in the longitudinal direction of the material web with respect to the support frame (16) on both sides outside the forceps legs; and (c) the adhesion reducing foil (23) is attached to the support frame (16) behind said pivot point (14c) when viewed in the direction of conveyance of the material web (2). is supported on a folding deflection point (16c) which is immovable relative to said deflection point (16c), and via said deflection point (16c), the adhesion reducing foil (23) is located behind said pivot point (14c). the section is deflected in the region of the inside (14e, 14f) of the forceps legs (14a, 14b), and (d) the tensioning frame (17) is guided via a spring element (24) with a preload. It is supported on a support frame (16), in which case the preload acting in the conveying direction of the material web (2) is received by the adhesion reducing foil (23) held at the turning point (16c). (e) The carriage (20) is coupled to a support frame (16) via a separation drive (25), and the carriage moves in the direction of conveyance of the material web (2) via the support frame. (f) One of the forceps legs (14a, 14b) (
14a) is attached to the carriage (20) via the forceps drive (22) so that the forceps legs (14a, 14b) are at least close to the forceps closed position when the forceps drive is switched to the no-load condition. A gripper device for entraining an adhesive material web, characterized in that it is pivotably arranged so as to assume a separating position. 2. The support frame (16) has support rolls (16a) between which the tension frame (17) is held transversely and perpendicularly to the longitudinal direction of the material web (2). Gripper device according to claim 1, characterized in that: 3. The carriage according to claim 1 or 2, characterized in that the carriage (20) is movably supported by the tensioning frame (17) in the longitudinal direction of the tensioning frame via guide rolls (20a). gripper device. 4. One of claims 1 to 3, characterized in that the upper forceps leg (14a) with respect to the material web (2) is pivotably connected to the carriage (20). Gripper device as described in section. 5. The foil for reducing adhesion (23) is attached to the forceps leg (1
4a, 14b) free end sections (14g, 14h)
5. Gripper device according to claim 1, characterized in that it is mounted on a tension frame (17) in such a way that it can be wrapped around. 6. The fixing point (17c) for the foil end section (23a) belonging to the upper forceps leg (14a) is the same as the fixing point (17c) of the other foil end section (23b).
f), characterized in that it is located at the front in the direction of conveyance of the material web (2).
Gripper device as described in section. 7. End section (14g,
7. Gripper device according to claim 1, wherein the gripper device 14h) has a recess (14i, 14k) on the inside (14e, 14f) which improves the holding effect. 8. Gripper device according to claim 1, characterized in that the spring element, the separating drive and the forceps drive are constructed as a cylinder unit (24, 25, 22). 9. The support frame (16) is connected to the trolley (12) so as to be pivotable about the horizontal axis (15a), and the fixing device allows adjustment stops (21b, 21d, 16
9. Gripper device according to claim 1, characterized in that it can be fixed in a variable working position via d). 10. Gripper according to claim 9, characterized in that the trolley (12) is provided with a brake (15b), by which the support frame (16) can be fixed in a pivoted position out of its working position. Device.